Another thing to consider is new Holley carbs are not that expensive and it might be smarter just to buy a new carb. The 650 cost a bit more than the 750. By the time you pay for a rebuild kit and the mechanic’s time a new one starts looking like a smarter move. Depending on the age of your carb a kit might not fix some of the problems you might have.
It looks like you have a Holley fuel manifold and if that is the case you can turn it around and connect the fuel line from the front of the engine. Take a look at this link http://www.panteraplace.com/page225.htm
Mike
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